Bi-annual	US dollars
1987-06-30	0
1987-12-31	2
1988-06-30	7
1988-12-31	34
1989-06-30	31
1989-12-31	6
1990-06-30	9
1990-12-31	2
1991-06-30	2
1991-12-31	19
1992-06-30	11
1992-12-31	56
1993-06-30	9
1993-12-31	4
1994-06-30	8
1994-12-31	0
1995-06-30	3
1995-12-31	0
1996-06-30	0
1996-12-31	31
1997-06-30	5
1997-12-31	2
1998-06-30	3
1998-12-31	0
1999-06-30	0